package cn.goktech.utils;

import java.util.Enumeration;

import javax.servlet.http.HttpServletRequest;

public class PageDAO {
	public static final String Text = "text";

	public static final String BbsText = "bbstext";

	public static final String BbsImage = "bbsimage";

	private HttpServletRequest request;

	private int currentpage = 1; // 当前是第几页

	private int pagecount = 0; // 一共有多少页

	private int rscount = 0; // 一共有多少行

	private int pagesize = 6; // 每页有多少行[默认为20行]

	public PageDAO(HttpServletRequest request) {
		this.request = request;
	}

	public void setCurrentpage(int currentpage) {
		this.currentpage = currentpage;
	}

	public void setPagecount(int pagecount) {
		this.pagecount = pagecount;
	}

	public int getPagesize() {
		return pagesize;
	}

	public void setPagesize(int pagesize) {
		this.pagesize = pagesize;
	}

	public int getRscount() {
		return rscount;
	}

	public void setRscount(int rscount) {
		this.rscount = rscount;
	}

	/**
	 * 获取总页数
	 * 
	 * @return int
	 */
	public int getPageCount() {
		try {
			this.pagecount = ((this.rscount - 1) / this.pagesize) + 1;
		} catch (Exception ex) {
			this.pagecount = 0;
		}
		return this.pagecount;
	}

	/**
	 * 获取当前页码的设置
	 * 
	 * @return int
	 */
	public int getCurrentPage() {
		try {
			if (this.request.getParameter("currentpage") != null
					&& Integer.parseInt(this.request.getParameter("currentpage")) > 1) {
				this.currentpage = Integer.parseInt(this.request.getParameter("currentpage"));
			} else {
				this.currentpage = 1;
			}
		} catch (Exception ex) {
			this.currentpage = 1;
		}
		return this.currentpage;
	}

	/**
	 * 分页工具条
	 * 
	 * @param fileName
	 *            String
	 * @return String
	 */
	public String pagetool(String flag) {
		// 计算总页数
		getPageCount();
		StringBuffer str = new StringBuffer();
		String temp = "";
		// 智能解析请求的参数列表
		String url = this.getParamUrl();
		int ProPage = this.currentpage - 1;
		int Nextpage = this.currentpage + 1;
		// 文字的分页
		if (flag.equals(PageDAO.Text)) {
			str.append("<form method='post' name='pageform' action=''>");
			str.append("<table width='100%' border='0' cellspacing='0' cellpadding='0'>");
			str.append("<tr>");
			str.append("<td height='26' align='center'>");
			str.append("共有记录" + this.rscount + "条&nbsp;&nbsp;");
			str.append("共" + this.pagecount + "页&nbsp;&nbsp;");
			str.append("每页" + this.pagesize + "记录&nbsp;&nbsp;");
			str.append("现在" + this.currentpage + "/" + this.pagecount + "页");
			str.append("&nbsp;&nbsp;");
			if (this.currentpage > 1) {
				str.append("<a href='" + url + "&currentpage=1'>首页</a>");
				str.append("&nbsp;");
				str.append("<a href='" + url + "&currentpage=" + ProPage + "'>上一页</a>");
				str.append("&nbsp;&nbsp;");
			} else {
				str.append("首页");
				str.append("&nbsp;&nbsp;");
				str.append("上一页");
				str.append("&nbsp;&nbsp;");
			}
			if (this.currentpage < this.pagecount) {
				str.append("<a href='" + url + "&currentpage=" + Nextpage + "'>下一页</a>");
				str.append("&nbsp;&nbsp;");
			} else {
				str.append("下一页");
				str.append("&nbsp;&nbsp;");
			}
			if (this.pagecount > 1 && this.currentpage != this.pagecount) {
				str.append("<a href='" + url + "&currentpage=" + pagecount + "'>尾页</a>");
				str.append("&nbsp;&nbsp;");
			} else {
				str.append("尾页");
				str.append("&nbsp;&nbsp;");
			}
			str.append("转到");
			str.append("<select name='currentpage' onchange='javascript:ChangePage(this.value);'>");
			for (int j = 1; j <= pagecount; j++) {
				str.append("<option value='" + j + "'");
				if (currentpage == j) {
					str.append("selected");
				}
				str.append(">");
				str.append("" + j + "");
				str.append("</option>");
			}
			str.append("</select>页");
			str.append("</td></tr></table>");
			str.append("<script language='javascript'>");
			str.append("function ChangePage(testpage){");
			str.append("document.pageform.action='" + url + "&currentpage='+testpage+'';");
			str.append("document.pageform.submit();");
			str.append("}");
			str.append("</script>");
			str.append("</form>");

		} else if (flag.equals(PageDAO.BbsText)) {
			/**
			 * 论坛形式的分页[直接以数字方式体现]
			 */
			str.append("<table width='100%' border='0' cellspacing='0' cellpadding='0'>");
			str.append("<tr>");
			str.append("<td width='3%'>&nbsp;</td>");
			str.append("<td height='26' align='center'>");
			str.append("记录" + this.rscount + "条&nbsp;&nbsp;");
			str.append("共" + this.pagecount + "页&nbsp;&nbsp;");
			str.append("每页" + this.pagesize + "记录&nbsp;&nbsp;");
			str.append("现在" + this.currentpage + "/" + this.pagecount + "页");
			str.append("</td><td>");
			// 设定是否有首页的链接
			if (this.currentpage > 1) {
				str.append("<a href='" + url + "&currentpage=1'>首页</a>");
				str.append("&nbsp;&nbsp;");
			}
			// 设定是否有上一页的链接
			if (this.currentpage > 1) {
				str.append("<a href='" + url + "&currentpage=" + ProPage + "'>上一页</a>");
				str.append("&nbsp;&nbsp;&nbsp;");
			}
			// 如果总页数只有10的话
			if (this.pagecount <= 10) {
				for (int i = 1; i <= this.pagecount; i++) {
					if (this.currentpage == i) {
						str.append("<font color=red>[" + i + "]</font>&nbsp;&nbsp;");
					} else {
						str.append("<a href='" + url + "&currentpage=" + i + "'>" + i + "</a>&nbsp;&nbsp;");
					}
				}
			} else {
				// 说明总数有超过10页
				// 制定特环的开始页和结束页

				int endPage = this.currentpage + 4;
				if (endPage > this.pagecount) {
					endPage = this.pagecount;
				}
				int startPage = 0;
				if (this.pagecount >= 8 && this.currentpage >= 8) {
					startPage = this.currentpage - 5;
				} else {
					// 表示从第一页开始算
					startPage = 1;
				}
				System.out.println(startPage);
				System.out.println(endPage);
				for (int i = startPage; i <= endPage; i++) {
					if (this.currentpage == i) {
						str.append("<font color=red>[" + i + "]</font>&nbsp;&nbsp;");
					} else {
						str.append("<a href='" + url + "&currentpage=" + i + "'>" + i + "</a>&nbsp;&nbsp;");
					}
				}
			}
			// 设定是否有下一页的链接
			if (this.currentpage < this.pagecount) {
				str.append("<a href='" + url + "&currentpage=" + Nextpage + "'>下一页</a>");
				str.append("&nbsp;&nbsp;");
			}
			// 设定是否有尾页的链接
			if (this.pagecount > 1 && this.currentpage != this.pagecount) {
				str.append("<a href='" + url + "&currentpage=" + pagecount + "'>尾页</a>");
				str.append("&nbsp;&nbsp;");
			}

			str.append("</td><td width='3%'>&nbsp;</td></tr></table>");
		} else if (flag.equals(PageDAO.BbsImage)) {
			/**
			 * 论坛形式的分页[以图片的方式体现]
			 */
			// 设定分页显示的CSS
			str.append("<style>");

			str.append(
					"DIV.meneame {PADDING-RIGHT: 3px; PADDING-LEFT: 3px; FONT-SIZE: 80%; PADDING-BOTTOM: 3px; MARGIN: 3px; COLOR: #ff6500; PADDING-TOP: 3px; TEXT-ALIGN: center;}");
			str.append(
					"DIV.meneame A {BORDER-RIGHT: #ff9600 1px solid; PADDING-RIGHT: 7px; BACKGROUND-POSITION: 50% bottom; BORDER-TOP: #ff9600 1px solid; PADDING-LEFT: 7px; BACKGROUND-IMAGE: url('"
							+ this.request.getContextPath()
							+ "/meneame.jpg'); PADDING-BOTTOM: 5px; BORDER-LEFT: #ff9600 1px solid; COLOR: #ff6500; MARGIN-RIGHT: 3px; PADDING-TOP: 5px; BORDER-BOTTOM: #ff9600 1px solid; TEXT-DECORATION: none}");
			str.append(
					"DIV.meneame A:hover {BORDER-RIGHT: #ff9600 1px solid; BORDER-TOP: #ff9600 1px solid; BACKGROUND-IMAGE: none; BORDER-LEFT: #ff9600 1px solid; COLOR: #ff6500; BORDER-BOTTOM: #ff9600 1px solid; BACKGROUND-COLOR: #ffc794}");
			str.append(
					"DIV.meneame SPAN.current {BORDER-RIGHT: #ff6500 1px solid; PADDING-RIGHT: 7px; BORDER-TOP: #ff6500 1px solid; PADDING-LEFT: 7px; FONT-WEIGHT: bold; PADDING-BOTTOM: 5px; BORDER-LEFT: #ff6500 1px solid; COLOR: #ff6500; MARGIN-RIGHT: 3px; PADDING-TOP: 5px; BORDER-BOTTOM: #ff6500 1px solid; BACKGROUND-COLOR: #ffbe94}");
			str.append(
					"DIV.meneame SPAN.disabled {BORDER-RIGHT: #ff9600 1px solid; PADDING-RIGHT: 7px; BORDER-TOP: #ff9600 1px solid; PADDING-LEFT: 7px; PADDING-BOTTOM: 5px; BORDER-LEFT: #ff9600 1px solid; COLOR: #ff9600; MARGIN-RIGHT: 3px; PADDING-TOP: 5px; BORDER-BOTTOM: #ff9600 1px solid}");
			str.append("</style>");
			str.append("<div class=\"meneame\">");
			// 判定是否有上一页
			if (this.currentpage > 1) {
				str.append("<a href='" + url + "&currentpage=1' hidefocus=\"true\">首页</a>");
				str.append("&nbsp;&nbsp;&nbsp;");
				str.append("<a href='" + url + "&currentpage=" + ProPage + "' hidefocus=\"true\">上一页</a>");
				str.append("&nbsp;&nbsp;&nbsp;");
			} else {
				str.append("<span class=\"disabled\">首页</span>");
				str.append("&nbsp;&nbsp;");
				str.append("<span class=\"disabled\">上一页</span>");
				str.append("&nbsp;&nbsp;");
			}
			// 显示中间的图片
			if (this.pagecount <= 10) {
				for (int i = 1; i <= this.pagecount; i++) {
					if (this.currentpage == i) {
						str.append("<span class=\"current\">" + i + "</span>");
					} else {
						str.append("<a href='" + url + "&currentpage=" + i + "' hidefocus=\"true\">" + i
								+ "</a>&nbsp;&nbsp;");
					}
				}
			} else {
				// 说明总数有超过10页
				// 制定特环的开始页和结束页
				int endPage = this.currentpage + 4;
				if (endPage > this.pagecount) {
					endPage = this.pagecount;
				}
				int startPage = 0;
				if (this.pagecount >= 8 && this.currentpage >= 8) {
					startPage = this.currentpage - 5;
				} else {
					// 表示从第一页开始算
					startPage = 1;
				}
				System.out.println(startPage);
				System.out.println(endPage);
				for (int i = startPage; i <= endPage; i++) {
					if (this.currentpage == i) {
						str.append("<span class=\"current\">" + i + "</span>");
					} else {
						str.append("<a href='" + url + "&currentpage=" + i + "' hidefocus=\"true\">" + i
								+ "</a>&nbsp;&nbsp;");
					}
				}
			}

			// 判断下一页和尾页
			if (this.currentpage < this.pagecount) {
				if (this.currentpage < this.pagecount - 10) {
					str.append("...");
					str.append("<a href='" + url + "&currentpage=" + (this.pagecount - 1) + "' hidefocus=\"true\">"
							+ (this.pagecount - 1) + "</a>&nbsp;&nbsp;");
					str.append("<a href='" + url + "&currentpage=" + this.pagecount + "' hidefocus=\"true\">"
							+ this.pagecount + "</a>&nbsp;&nbsp;");
				}

				str.append("<a href='" + url + "&currentpage=" + Nextpage + "' hidefocus=\"true\">下一页</a>");
				str.append("&nbsp;&nbsp;");
			} else {
				str.append("<span class=\"disabled\">下一页</span>");
				str.append("&nbsp;&nbsp;");
			}
			if (this.pagecount > 1 && this.currentpage != this.pagecount) {
				str.append("<a href='" + url + "&currentpage=" + pagecount + "' hidefocus=\"true\">尾页</a>");
				str.append("&nbsp;&nbsp;");
			} else {
				str.append("<span class=\"disabled\">尾页</span>");
				str.append("&nbsp;&nbsp;");
			}
			str.append("</div>");
		}

		return str.toString();
	}

	/**
	 * 
	 * @return 返回带有所有请求参数的url
	 */

	public String getParamUrl() {
		String url = "";
		url = this.request.getRequestURI().toString();
		if (url.indexOf("?") == -1) {
			url = url + "?";
		}
		String totalParams = "";
		Enumeration params = this.request.getParameterNames();// 得到所有参数名
		while (params.hasMoreElements()) {
			String tempName = params.nextElement().toString();
			String tempValue = this.request.getParameter(tempName);
			if (tempValue != null && !tempValue.equals("") && !tempName.equals("currentpage")) {
				if (totalParams.equals("")) {

					totalParams = totalParams + tempName + "=" + tempValue;
				} else {
					totalParams = totalParams + "&" + tempName + "=" + tempValue;
				}
			}
		}
		String totalUrl = url + totalParams;
		return totalUrl;
	}
}
